20210012111 has 4 divisors (see below), whose sum is σ = 20300640192. Its totient is φ = 20119384032.

The previous prime is 20210012059. The next prime is 20210012129. The reversal of 20210012111 is 11121001202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11121001202 = 2 ⋅5560500601.

It is a cyclic number.

It is not a de Polignac number, because 20210012111 - 2³⁰ = 19136270287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210012092 and 20210012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210012171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45313706 + ... + 45314151.

It is an arithmetic number, because the mean of its divisors is an integer number (5075160048).

Almost surely, 2^20210012111 is an apocalyptic number.

20210012111 is a deficient number, since it is larger than the sum of its proper divisors (90628081).

20210012111 is an equidigital number, since it uses as much as digits as its factorization.

20210012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90628080.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20210012111 its reverse (11121001202), we get a palindrome (31331013313).

The spelling of 20210012111 in words is "twenty billion, two hundred ten million, twelve thousand, one hundred eleven".